Trigeminal deafferentation and prehension in the pigeon.
Trigeminal deafferentation and prehension in the pigeon.
复制标题
鸽子的三叉神经传入神经阻滞和抓握。
DOI：
10.1016/s0166-4328(89)80008-7
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发表时间：
1989
影响因子：
2.7
通讯作者：
Zeigler,HP
中科院分区：
文献类型：
--
作者：
Bermejo,R;Zeigler,HP
在鸽子摄食啄食行为的抓握和操纵阶段，下巴张开的运动是按比例缩放到目标（食物）物体的大小。为了评估喙机械感受器传入控制的贡献，我们检查了双侧三叉神经脱传入对颌骨张开轨迹运动学的影响。失语的受试者在啄定位的准确性上表现出短暂的降低，在他们的摄食啄反应的有效性上表现出更持久的缺陷。然而，它们继续表现出与正常鸽子相同的颚部运动。脱牙后靶尺寸与开口之间的函数关系保持不变，控制颚开度的运动学变量之间的关系也保持不变。然而，脱牙对抓握和下颌骨的峰开口绝对值的增加虽小但却很显著，这反映了峰开口速度的增加。讨论了与快速目标运动的感觉控制问题有关的结果。
During the grasping and manipulation phases of the pigeon's ingestive pecking behavior, jaw opening movements are scaled to the size of the target (food) object. To assess the contribution of beak mechanoreceptor afferents to the control of scaling we examined the effects of bilateral trigeminal deafferentation upon the kinematics of jaw opening trajectories. Deafferented subjects exhibited both a transient reduction in the accuracy of peck localization and a more persistent deficit in the effectiveness of their ingestive pecking response. However, they continued to exhibit the same classes of jaw movement described for the normal pigeon. The functional relation between target size and gape remained unchanged after deafferentation as did the relationships among kinematic variables controlling jaw opening. However, deafferentation produced small but significant increase in the absolute values of peak gape for both grasping and mandibulation which reflects an increase in peak opening velocity. The results are discussed in relation to the problem of sensory control of rapid targeted movements.